NAND endurance is on its way down with each subsequent process generation. At the same time unrecoverable bit error rates are on their way up. Companies like SandForce have included powerful ECC engines in their SSD controllers and implemented RAID-like technologies to deal with the problem. Today Micron is providing an alternative solution: ClearNAND. 25nm NAND with an on-package 24-bit BCH ECC engine per device.
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